docs: def createEmails(nicks=None, nicksFile=None):
      """
      Method that globally permits to generate the emails to be checked.
  
      Args:
      -----
          nicks: List of aliases.
          nicksFile: The filepath to the aliases file.
  
      Returns:
      --------
          list: list of emails to be checked.
      """
      candidate_emails = set()
      if nicks != None:
          for n in nicks:
              for e in email_providers.domains:
                  candidate_emails.add("{}@{}".format(n, e))
      elif nicksFile != None:
          with open(nicksFile, "r") as iF:
              nicks = iF.read().splitlines()
              for n in nicks:
                  for e in email_providers.domains:
                      candidate_emails.add("{}@{}".format(n, e))
      return candidate_emails